@misc{indiciaeb54049f6c2ef,
  title = {Nonlinear acoustic propagation in two-dimensional ducts},
  author = {Nayfeh, A. H. and Tsai, M.-S.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740054302},
  note = {Source identifier: 19740054302}
}